Malicious PDF — malware analysis report

Static analysis result for SHA-256 af506872c58cb222…

MALICIOUS

PDF

73.6 KB Created: 2021-07-17 19:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 685df4db5c5a8f3f6a55ab21235d5dca SHA-1: f9781ffe82379f75d6b75b37cf25509bd3b13288 SHA-256: af506872c58cb222f7d223a9c71a026dd5f05354babb6e82ac3ffdd5192b6749
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically one pointing to a search result with 'avakin life hack coins and diamonds', suggests a phishing or scam lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into clicking on deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7788

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://feedproxy.google.com/~r/sq/ugae/~3/eoPDrVzwpx0/square?utm_term=avakin+life+hack+coins+and+diamonds
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee1e5f64675e3b9ddee1ff/1626218079320/nusinatefesanas.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f2836f6c177f33d79a00eb/1626506095783/21842847299.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e83c098fb0dc0613f0cd21/1625832457675/garupopofidukesen.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c16f.bin
a9726b2589eb4ecf7f2e9aa487273a38482858c5179bde6e86bc9ab8ae9c5896		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC16F 10680 bytes
font_01_sfnt_off0000d9c2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C2 16792 bytes
font_02_sfnt_off0000f1d4.bin
7d7dee299aa25bab1a48080595e706ad6d53b1716db3b0fb1a96c706b8155580		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D4 15952 bytes

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